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What do you think of the shorter rods as alternatives, such as the 65mm or 100mm long versions? For the same general price you could get more rods and make a larger diameter loop.
Which begs the question-- which is better: shorter ferrite rods with bigger overall loop diameter, or longer ferrite rods but smaller loop diameter?
73 from across town...
Puyallup, WA USA
--- In ultralightdx@..., D1028Gary@... wrote:
Yikes! The Russian ferrite sellers on eBay may be reading the
Ultralightdx messages, including the post that I sent this morning
regarding the price of the 140mm x 8mm rods used in the 7" diameter
"Affordable" FSL antenna design. The shipped price of these rods from
"Alexer1" has practically doubled, compared to his asking price this
The price of the same rods from "Sovtube" is still very reasonable,
though (at least at this moment). 70 of these rods (enough to build the
63 rod FSL) can be obtained from him for $104 (US Dollars) including
air mail shipping to North America, according to his current listing at
The supply and prices of these Russian surplus ferrite rods on eBay
have always been very unpredictable, and of course all of the sellers
try to make as many rubles of profit as possible (they seem to have
adapted to capitalism quite eagerly). My advice is to wait until you
see a listing of a very large number of ferrite rods (enough to build
your chosen FSL design) at a reasonable price, and then secure them all
in one single purchase. The sellers will probably try to raise the
asking price after your order, but they have been doing that anyway for
73, Gary DeBock (in Puyallup, WA, USA)